Discussion
Which one of the following provides the ability to query information from the database and to insert tuples into, delete tuples from, and modify tuples in the database ?
Answer: A
Correct answer: DML(Data Manipulation Langauge)
Querying, inserting, deleting and modifying tuples are exactly the operations of the Data Manipulation Language: SELECT, INSERT, DELETE and UPDATE.
DDL by contrast defines the structures those tuples live in. Note that the query language is a part of DML rather than a separate thing, which is why "Query" as an option is too narrow - it names one of the four capabilities the question lists. A relational schema is a description, not a language.
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